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. 1975 Jan;55(1):114–119. doi: 10.1104/pp.55.1.114

Multiple Forms of Invertase in Developing Oat Internodes 1

Richard A Jones a,2, Peter B Kaufman a
PMCID: PMC541564  PMID: 16659014

Abstract

Three different invertases are found in the developing internodes of oat (Avena sativa cv. Victory). Two soluble invertases (I and II) are separable on diethylaminoethylcellulose and Sephadex columns. They are further distinguished by their kinetic constants, heat stability, and differences in stability and apparent activity optima in response to pH treatments. Relative activities of the two soluble isozymes change considerably during the developmental stages examined. Invertase I activity rises early and begins to fall after maximal activity is reached at 6 hours of incubation. This early increase in activity accompanies the period of most rapid growth rate of the internode. Invertase II activity does not increase significantly during the first 6 hours of internode extension, but rapidly rises to a maximum activity at 16 hours, then declines. The third form of invertase, bound invertase (III), is present in both immature and mature stem tissue. Its activity increases (by 6 hours) during immature growth stages, decreases considerably with maturation, and remains relatively constant in mature tissue.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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